<?php
/**
 * Created by PhpStorm.
 * User: zhangyurong
 * Date: 2017/8/25
 * Time: 13:51
 */

namespace App\Repositories\Eloquent;

use App\Models\WeiXin\WeiXinToken;
use App\Facades\Site as WpSite;
use Illuminate\Support\Facades\Cache;

class WeiPin {
    private $appId;
    private $appSecret;

    public function __construct() {
        $this->appId = WpSite::get('mpCompanyAppID');
        $this->appSecret = WpSite::get('mpCompanyAppsecret');
    }

    public function getSignPackage() {
        $jsapiTicket = $this->getJsApiTicket();

        // 注意 URL 一定要动态获取，不能 hardcode.
        $protocol = (!empty($_SERVER['HTTPS']) && $_SERVER['HTTPS'] !== 'off' || $_SERVER['SERVER_PORT'] == 443) ? "https://" : "http://";
        $url = "$protocol$_SERVER[HTTP_HOST]$_SERVER[REQUEST_URI]";

        $timestamp = time();
        $nonceStr = $this->createNonceStr();

        // 这里参数的顺序要按照 key 值 ASCII 码升序排序
        $string = "jsapi_ticket=$jsapiTicket&noncestr=$nonceStr&timestamp=$timestamp&url=$url";

        $signature = sha1($string);

        $signPackage = array(
            "appId"     => $this->appId,
            "nonceStr"  => $nonceStr,
            "timestamp" => $timestamp,
            "url"       => $url,
            "signature" => $signature,
            "rawString" => $string
        );
        return $signPackage;
    }

    private function createNonceStr($length = 16) {
        $chars = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";
        $str = "";
        for ($i = 0; $i < $length; $i++) {
            $str .= substr($chars, mt_rand(0, strlen($chars) - 1), 1);
        }
        return $str;
    }

    private function getJsApiTicket() {
        // jsapi_ticket 应该全局存储与更新，以下代码以写入到文件中做示例
        $data = json_decode($this->get_php_file("jsapi_ticket.php"));
        if (empty($data->expire_time) || $data->expire_time < time()) {
            $accessToken = $this->getAccessToken();
            // 如果是企业号用以下 URL 获取 ticket
            // $url = "https://qyapi.weixin.qq.com/cgi-bin/get_jsapi_ticket?access_token=$accessToken";
            $url = "https://api.weixin.qq.com/cgi-bin/ticket/getticket?type=jsapi&access_token=$accessToken";
            $res = json_decode($this->httpGet($url));
            $ticket = !empty($res->ticket) ? $res->ticket :'';
            if ($ticket) {
                $data=(object)null;
                $data->expire_time = time() + 7000;
                $data->jsapi_ticket = $ticket;
                $this->set_php_file("jsapi_ticket.php", json_encode($data));
            }
        } else {
            $ticket = $data->jsapi_ticket;
        }

        return $ticket;
    }

    private function getHttpsAccessToken() {
        $AppID = $this->appId;
        $Appsecret = $this->appSecret;
        $get_at_array=array();
        $url = "https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=".$AppID."&secret=".$Appsecret;
        $ch = curl_init();
        curl_setopt($ch, CURLOPT_URL, $url);
        curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE);
        curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, FALSE);
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
        $output = curl_exec($ch);
        curl_close($ch);
        $get_at_array = json_decode($output);
        $get_at_array->created_time=time();
        $access_token=json_encode($get_at_array);
        return $access_token;
    }

    /**
     * 检测token ，110分更新一次
     * @param $type
     * @param $catetory
     * @return string
     */
    private function getAccessToken(){
        $catetory=3;
        if($token = WeiXinToken::select('token','category','created_at')->where('category',$catetory)->first()){

            //检查时间，提前十分钟更新token
            $currentTime = strtotime(date("Y-m-d H:i:s",time()));//当前时间
            $tokenTime = strtotime(date("Y-m-d H:i:s",strtotime(' 110 minute',strtotime($token->created_at))));

            if(($tokenTime - $currentTime) < 0 ){

                //过期,更新token
                $wechatToken = json_decode($this->getHttpsAccessToken());
                if(!empty($wechatToken->access_token)){
                    WeiXinToken::where('category',$catetory)->update(['token'=>$wechatToken->access_token,'created_at'=>date("Y-m-d H:i:s",time())]);
                    return $wechatToken->access_token;
                }else{
                    return 'no token';
                }

            }else{
                return $token->token;
            }

        }else{
            //没有记录，插入一条记录
            $wechatToken = json_decode($this->getHttpsAccessToken());

            if(!empty($wechatToken->access_token)){
                $data['token'] =  $wechatToken->access_token;
                $data['category'] = $catetory;
                WeiXinToken::create($data);
                return $wechatToken->access_token;
            }else{
                return 'no token';
            }

        }
    }

    private function httpGet($url) {
        $curl = curl_init();
        curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
        curl_setopt($curl, CURLOPT_TIMEOUT, 500);
        // 为保证第三方服务器与微信服务器之间数据传输的安全性，所有微信接口采用https方式调用，必须使用下面2行代码打开ssl安全校验。
        // 如果在部署过程中代码在此处验证失败，请到 http://curl.haxx.se/ca/cacert.pem 下载新的证书判别文件。
        @curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, true);
        @curl_setopt($curl, CURLOPT_SSL_VERIFYHOST, true);
        curl_setopt($curl, CURLOPT_URL, $url);

        $res = curl_exec($curl);
        curl_close($curl);

        return $res;
    }

    private function get_php_file($filename) {
        return trim(Cache::get($filename));
    }
    private function set_php_file($filename, $content) {
        Cache::forever($filename, $content);
    }
}
